So I connected the RPi to the 6SE mount through the NexStar+ HC USB port. My Fake One star Align isn't all that simple since the +HC forces me to do a Fake Three Star alignment first. After that fails, I can do a Fake One Star alignment. But the upshot is that the autoguiding works through the mount in this configuration. You can do PHD2 guiding through the 6SE mount if you get by the alignment nonsense on the HC. Clearly the driver is translating the PHD2 pulse guiding commands into something the motor driver understands with the HC as an intermediary.

Mike

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